Other Comprehensive (Loss) Income (Schedule of Components of Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 10,749
Other comprehensive income (loss), net of tax	80	$ (104)
Balance, end of period	11,196	11,156
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(5,314)	(4,575)
Other comprehensive (loss) income before reclassifications	77	(134)
Amounts reclassified from accumulated other comprehensive loss	3	30
Other comprehensive income (loss), net of tax	80	(104)
Balance, end of period	(5,234)	(4,679)
Pension and Post-Retirement Plans Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,721)	(3,202)
Other comprehensive (loss) income before reclassifications	(48)	35
Amounts reclassified from accumulated other comprehensive loss	3	30
Other comprehensive income (loss), net of tax	(45)	65
Balance, end of period	(2,766)	(3,137)
Deferred tax assets, net	1,354	1,480
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,593)	(1,373)
Other comprehensive (loss) income before reclassifications	125	(169)
Amounts reclassified from accumulated other comprehensive loss	0	0
Other comprehensive income (loss), net of tax	125	(169)
Balance, end of period	(2,468)	(1,542)
Deferred tax liabilities, net	$ 2	$ 13